Thread: stupid question...

ok everyone, I have another stupid question...

what's wrong with this function implementation?

Code:

#include <map>
#include <iterator>
#include <iostream>
#include <fstream>
using namespace std;

template <typename keyType, typename valueType>
void display(map<keyType, valueType> &words_for_query, ostream &ofile=cout)
{
    map<keyType, valueType>::const_iterator istart = words_for_query.begin();   iend = words_for_query.end();
    for ( ;istart != iend; istart++)
        ofile << istart->first << ": " << istart->second << "\n";
}

I use g++ to compile it. and the error report is:
test.cpp:12: error: expected `;' before ‘istart’
test.cpp:13: error: ‘iend’ was not declared in this scope
test.cpp:14: error: ‘istart’ was not declared in this scope


completely noob to c++, any help and suggestion appreciated!

Two things I see. First, you need to add the keyword typename in front of map<keyType, valueType>::const_iterator.

Second, you use the iend variable without declaring it. You probably meant to make that a comma instead of a semicolon just before it.

ahhhhhhhh,,,,I should use typename in this way!
hehe,,,I haven't read anything about that in the book yet -_-#
anyway, problem solved, thanks!


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the 3rd day